The document discusses applet initialization and termination. When an applet begins, the methods init(), start(), and paint() are called in that order. When an applet terminates, the methods stop() and destroy() are called, with stop() always being called before destroy(). The init() method initializes variables and is only called once, while start() resumes execution when the user returns to the page and paint() repairs damage when the applet regains focus.

1. Applet initialization and termination
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2. Objectives
On completion of this period, you would be able
to learn
• Applet initialization
• Applet termination
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3. Recap
In the last class, you have studied about
• Applet Skeleton :
which provide the basic structure for the applet
programming
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4. Applet initialization and termination
• It is important to understand the order in which
the various methods shown in the skeleton are
called
• When an applet begins, the AWT calls the
following methods in this sequence
1. init( )
2. start( )
3. paint( )
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5. Applet initialization and termination
contd..
• When an applet is terminated, the following
sequence of method calls takes place
1. stop( )
2. destroy( )
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6. Order of Applet Initialization
init( )
• The init( ) method is the first method to be
called.
• It initializes variables
• It is called only once during the run time of your
applet
start( )
• The start( ) method is called after init( )
• When a user leaves a web page and comes
back, the applet resumes execution
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7. Order of Applet Initialization
paint( )
• Called each time the applet gets the focus
• The AWT monitors the windows system and
notices things like other windows covering the
applet
• Then calls paint() method to repair any damage
the applet is uncovered or exposed
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8. Order of Applet Termination Contd..
stop( )
• The stop( ) method is called when a web
browser leaves the HTML document containing
the applet
• When stop( ) is called, the applet is probably
running
destroy( )
• If your applet needs to be removed completely
from memory,
• The stop( ) method is always called before
destroy( )
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9. Order of Applet Termination
contd..
When Applet runs , it generates the window below
as shown
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10. Summary
In this class, you have learnt
• Methods called during applet initialization
1. init( )
2. start( )
3. paint( )
• Methods called during applet termination
1. stop( )
2. destroy( )
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11. Frequently Asked Questions
• Write about the order of Applet initialization
• Write about the order of Applet termination
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12. Quiz
1. Is the sequence for applet is termination
correct
• stop( )
• start()
• destroy( )
a) YES
b) NO
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13. Quiz Contd..
2. Is the sequence for applet initialization correct
• init( )
• start( )
• destroy()
a) YES
b) NO
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